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  <a name="ZH-CN_TOPIC_0000001792505746"></a><a name="ZH-CN_TOPIC_0000001792505746"></a>
  <h1 class="topictitle1">恢复GaussDB实例</h1>
  <div>
   <p>当需要对已备份的GaussDB副本进行恢复时，可以参考本节恢复GaussDB至原位置或新位置。</p>
   <div class="section">
    <h4 class="sectiontitle">背景信息</h4>
    <p>支持使用备份副本、复制副本进行恢复。支持恢复至原位置（复制副本不支持恢复至原位置）或新位置。</p>
   </div>
   <div class="section">
    <h4 class="sectiontitle">前提条件</h4>
    <ul>
     <li>仅当数据库状态正常时，可进行恢复操作。</li>
     <li>执行恢复前，需在代理主机中启动backUpAgent。启动方法请参见《ProtectAgent安装指南》中的“启动backUpAgent”章节。</li>
     <li>执行恢复前，确保被OLTP OPS纳管的实例已打开监控。</li>
     <li>对于OLTP OPS，执行恢复前，确保在OLTP OPS管理界面已配置实例的备份默认根路径并执行过备份操作。若未执行过备份操作，需要刷新实例的备份默认根路径。配置实例的备份默认根路径和刷新操作，可参见<a href="zh-cn_topic_0000001792346026.html">步骤2：在TPOPS管理界面配置实例的备份默认根路径</a>。</li>
     <li>执行恢复前，确保原实例未被TPOPS解除纳管。</li>
     <li>执行恢复到新位置时，确保新实例已存在，且新实例与原实例的部署方式、分片数、版本号一致。</li>
     <li>时间点恢复依赖于NTP时钟，生产环境实例所在的各节点需保持同样的时钟源配置。</li>
     <li>恢复前请确保恢复目标实例的空间大于或等于备份副本大小。</li>
    </ul>
   </div>
   <div class="section">
    <h4 class="sectiontitle">注意事项</h4>
    <p>当恢复任务失败后，TPOPS实例监控将自动关闭，影响告警信息上报。用户需要手动开启实例监控，开启监控操作请参见<a href="zh-cn_topic_0000001839145117.html">步骤3：在TPOPS管理界面打开实例监控</a>。</p>
   </div>
   <div class="section">
    <h4 class="sectiontitle">操作步骤</h4>
    <ol>
     <li id="ZH-CN_TOPIC_0000001792505746__li0198134611381"><span>选择<span class="uicontrol" id="ZH-CN_TOPIC_0000001792505746__zh-cn_topic_0000001839145101_zh-cn_topic_0000001839142377_uicontrol17911421542">“<span id="ZH-CN_TOPIC_0000001792505746__zh-cn_topic_0000001839145101_zh-cn_topic_0000001839142377_text2791124220547">数据利用</span> &gt; <span id="ZH-CN_TOPIC_0000001792505746__zh-cn_topic_0000001839145101_zh-cn_topic_0000001839142377_text137911742135414">副本数据</span> &gt; <span id="ZH-CN_TOPIC_0000001792505746__zh-cn_topic_0000001839145101_zh-cn_topic_0000001839142377_text102119344153">数据库</span> &gt; GaussDB”</span>。</span><p></p>
      <div class="note" id="ZH-CN_TOPIC_0000001792505746__zh-cn_topic_0000001839145101_zh-cn_topic_0000001839142377_note10308124081215">
       <img src="public_sys-resources/note_3.0-zh-cn.png"><span class="notetitle"> </span>
       <div class="notebody">
        <p id="ZH-CN_TOPIC_0000001792505746__zh-cn_topic_0000001839145101_zh-cn_topic_0000001839142377_p5308194081211">对于1.5.0版本，请选择<span class="uicontrol" id="ZH-CN_TOPIC_0000001792505746__zh-cn_topic_0000001839145101_zh-cn_topic_0000001839142377_uicontrol53537515125">“<span id="ZH-CN_TOPIC_0000001792505746__zh-cn_topic_0000001839145101_zh-cn_topic_0000001839142377_text1035316516128">数据利用</span> &gt; <span id="ZH-CN_TOPIC_0000001792505746__zh-cn_topic_0000001839145101_zh-cn_topic_0000001839142377_text10353125121211">副本数据</span> &gt; <span id="ZH-CN_TOPIC_0000001792505746__zh-cn_topic_0000001839145101_zh-cn_topic_0000001839142377_text16353175161210">云平台</span> &gt; GaussDB”</span>。</p>
       </div>
      </div> <p></p></li>
     <li><span>支持以资源维度或以副本维度查找副本，本节以资源维度为例进行说明。</span><p></p><p>在<span class="uicontrol">“<span>资源</span>”</span>页签，根据实例名称查找到需要恢复的实例，并单击实例名称。</p> <p></p></li>
     <li><span>在<span class="uicontrol">“<span>副本数据</span>”</span>页面，依次选择年、月、天找到副本。</span><p></p><p>当时间上显示<span><img src="zh-cn_image_0000001839225137.png"></span>，即表示该月、该天存在副本。</p> <p></p></li>
     <li><span>找到要恢复的副本，单击其右侧的“<span>更多</span> &gt; <span>恢复</span>”。</span></li>
     <li><span>指定副本或时间点进行恢复。</span><p></p>
      <ol type="a">
       <li>指定某个副本或两个副本之间的任意时间点进行恢复。
        <ul>
         <li>指定某个副本进行恢复<p><span><img class="eddx" src="zh-cn_image_0000001839145189.png"></span></p></li>
         <li>指定时间点进行恢复。<p><span><img class="eddx" src="zh-cn_image_0000001792505810.png"></span></p> <p>时间轴上蓝色覆盖区域均可进行时间点恢复，<span><img src="zh-cn_image_0000001792346082.png"></span>表示该时间点存在副本。没有备份日志的时间点无法进行时间点恢复。</p></li>
        </ul></li>
       <li>恢复至原位置或新位置。
        <ul>
         <li>恢复至原位置<p>相关参数说明如<a href="#ZH-CN_TOPIC_0000001792505746__table774016874418">表1</a>所示。</p>
          <div class="tablenoborder">
           <a name="ZH-CN_TOPIC_0000001792505746__table774016874418"></a><a name="table774016874418"></a>
           <table cellpadding="4" cellspacing="0" summary="" id="ZH-CN_TOPIC_0000001792505746__table774016874418" frame="border" border="1" rules="all">
            <caption>
             <b>表1 </b>恢复至原位置参数说明
            </caption>
            <colgroup>
             <col style="width:24.21%">
             <col style="width:75.79%">
            </colgroup>
            <thead align="left">
             <tr>
              <th align="left" class="cellrowborder" valign="top" width="24.21%" id="mcps1.3.5.2.5.2.1.2.1.1.2.2.3.1.1"><p>参数</p></th>
              <th align="left" class="cellrowborder" valign="top" width="75.79%" id="mcps1.3.5.2.5.2.1.2.1.1.2.2.3.1.2"><p>说明</p></th>
             </tr>
            </thead>
            <tbody>
             <tr>
              <td class="cellrowborder" valign="top" width="24.21%" headers="mcps1.3.5.2.5.2.1.2.1.1.2.2.3.1.1 "><p><span>位置</span></p></td>
              <td class="cellrowborder" valign="top" width="75.79%" headers="mcps1.3.5.2.5.2.1.2.1.1.2.2.3.1.2 "><p>实例所在的位置，用户无法修改。</p></td>
             </tr>
            </tbody>
           </table>
          </div></li>
         <li>恢复至新位置
          <ol class="substepthirdol">
           <li>填写<span class="uicontrol">“基本信息”</span>，参数说明如<a href="#ZH-CN_TOPIC_0000001792505746__table1799312512502">表2</a>所示。 
            <div class="tablenoborder">
             <a name="ZH-CN_TOPIC_0000001792505746__table1799312512502"></a><a name="table1799312512502"></a>
             <table cellpadding="4" cellspacing="0" summary="" id="ZH-CN_TOPIC_0000001792505746__table1799312512502" frame="border" border="1" rules="all">
              <caption>
               <b>表2 </b>基本信息参数说明
              </caption>
              <colgroup>
               <col style="width:11.62%">
               <col style="width:88.38000000000001%">
              </colgroup>
              <thead align="left">
               <tr>
                <th align="left" class="cellrowborder" valign="top" width="11.62%" id="mcps1.3.5.2.5.2.1.2.1.2.1.1.3.2.3.1.1"><p>参数</p></th>
                <th align="left" class="cellrowborder" valign="top" width="88.38000000000001%" id="mcps1.3.5.2.5.2.1.2.1.2.1.1.3.2.3.1.2"><p>说明</p></th>
               </tr>
              </thead>
              <tbody>
               <tr>
                <td class="cellrowborder" valign="top" width="11.62%" headers="mcps1.3.5.2.5.2.1.2.1.2.1.1.3.2.3.1.1 "><p><span>目标项目</span></p></td>
                <td class="cellrowborder" valign="top" width="88.38000000000001%" headers="mcps1.3.5.2.5.2.1.2.1.2.1.1.3.2.3.1.2 "><p>填写恢复到新位置的项目。目标项目只能选中副本关联的实例所在项目。</p></td>
               </tr>
               <tr>
                <td class="cellrowborder" valign="top" width="11.62%" headers="mcps1.3.5.2.5.2.1.2.1.2.1.1.3.2.3.1.1 "><p><span style="color:#6C7280;">目标实例</span></p></td>
                <td class="cellrowborder" valign="top" width="88.38000000000001%" headers="mcps1.3.5.2.5.2.1.2.1.2.1.1.3.2.3.1.2 "><p>填写恢复到新位置的实例名称。</p>
                 <div class="note">
                  <span class="notetitle"> 说明： </span>
                  <div class="notebody">
                   <ul>
                    <li>恢复过程中，系统将清理目标位置的归档日志。</li>
                   </ul>
                   <ul>
                    <li>恢复前请确保恢复目标实例的空间大于或等于备份副本大小。</li>
                    <li><span style="color:#282B33;">恢复将覆盖目标位置的数据。</span></li>
                   </ul>
                  </div>
                 </div></td>
               </tr>
              </tbody>
             </table>
            </div></li>
           <li>单击<span class="uicontrol">“确定”</span>。</li>
          </ol></li>
        </ul></li>
      </ol> <p></p></li>
     <li><span>单击<span class="uicontrol">“确定”</span>。</span></li>
    </ol>
   </div>
  </div>
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